Graduate Thesis Or Dissertation
 

Biology and host relations of Meteorus comunis (Cresson)

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/02871011m

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  • Fifteen species of Noctuidae (Lepidoptera) were collected in alfalfa and peppermint in western Oregon. Seven of these species were hosts for the braconid parasitoid Meteorus communis. The most frequently parasitized (percent) species were Agrotis ipsilon (35.3), Dargida procincta (15.0), and Peridroma saucia (6.9). Other species parasitized were Autographa californica (3.8) and three infrequently collected species, Pseudaletia unipuncta (20.0), Amphipyra pyramidoides (10.0) and Xylena nupara (5.0). Parasitism of P. saucia, D. procincta and A. californica was higher in alfalfa than in peppermint. Larvae of M. communis overwintered inside overwintering host larvae. Six species of Noctuidae were studied in the laboratory as hosts for M. communis including D. procincta, P. saucia, A. ipsilon and A. californica which were hosts in the field, and Mamestra configurata and Trichoplusia ni which, although they occurred in the field, were not used as hosts. All six were found to be acceptable hosts in the laboratory but M. configurata and T. ni encapsulated most eggs and larvae of M. communis. Also, parasitoids able to complete development on M. configurata produced adults of significantly lighter dry weight than those produced by the other hosts. All hosts were heavily superparasitized under laboratory conditions.
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